Sliding member
AssigneeDaido Metal Company Ltd.
InventorRyo Hanai
Life of this patent
Estimating the term…
Abstract
A sliding member includes a back-metal layer and a sliding layer made of a copper alloy. The back-metal layer is made of a hypoeutectoid steel including 0.07 to 0.35 mass % of carbon, and has a structure including a ferrite phase and pearlite. The back-metal layer includes a pore existing region including a plurality of closed pores that are not open to a bonding surface when viewing a cross-section perpendicular to a sliding surface. The closed pores have an average size of 5 to 15 μm. The pore existing region extends from the bonding surface toward an inner portion of the back-metal layer, and has a thickness of 10 to 60 μm. A ratio V2/V1 of a total volume V2 of the closed pores to a volume V1 of the pore existing region is 0.05 to 0.1.
Claims7
A sliding member comprising:
- a back-metal layer having a back surface and a bonding surface;
- and
- a sliding layer on the bonding surface of the back-metal layer, the sliding layer being made of a copper alloy and having a sliding surface, the copper alloy comprising 0.5 to 12 mass % of Sn, 0.5 to 15 mass % of Ni, 0.06 to 0.2 mass % of P, and the balance of Cu and inevitable impurities,
- wherein the back-metal layer is made of a hypoeutectoid steel comprising 0.07 to 0.35 mass % of carbon, and has a structure comprising a ferrite phase and pearlite,
- wherein the back-metal layer includes a pore existing region, the pore existing region including a plurality of closed pores that are not open to the bonding surface when viewing a cross-section perpendicular to the sliding surface, the closed pores having an average size of 5 to 15 μm, the pore existing region extending from the bonding surface toward an inner portion of the back-metal layer and having a thickness of 10 to 60 μm, and
- wherein a ratio V2/V1 of a total volume V2 of the closed pores to a volume V1 of the pore existing region is 0.05 to 0.1.
Dependencies are inferred from the claim text.